Least square method of polynomial or the method based on the given function are used to fit pump characteristic curve in pump selection or operation.
在水泵的选型或运行中，通常采用多项式的最小二乘法或根据假设的函数关系来拟合水泵性能曲线。
This method is more suitable for pump cavitation performance curve fitting.
该方法较适合于泵汽蚀性能曲线的拟合。
From the performance perspective, the type of impeller and the general efficiency closed impeller or less the same, but the type of impeller pump head curve dropped more.
从性能上讲，该型式叶轮效率高和普通闭式叶轮相差不大，但用该型式叶轮泵扬程曲线较为陡降。
Conclusions: The ambroxol HCl osmotic pump controlled release tablets have a stable release curve and conform to zero release order.
结论：盐酸氨溴索渗透泵控释片释药稳定，零级释药明显，具备优良控释制剂的特征。
The stator curve of the power steering vane pump plays an important role in reducing noise.
汽车转向助力叶片泵的定子曲线对降低其噪声起着关键作用。
Pump selection, and sometimes need to consider the production process requirements, selection of different shapes QH characteristic curve.
选泵时，有时须考虑生产工艺要求，选用不同形状Q - H特性曲线。
Found with the selected metering pump performance curve of the corresponding.
找到与所选用的计量泵相应的性能曲线图。
The inlet pressure of the jet pump can also be obtained by the pressure ratio, and it can be used for acquiring the productivity curve of an oil well.
这样，就可以计算出诊断喷射泵井工况所需要的压力比，流量比和泵效等工况参数，泵吸入口压力还可用来计算油井的产能曲线。
The differences of stator curve were obtained that using different methods processed congeneric automobile power steering pump through reversed resolve.
通过反求，得出不同加工方法同类汽车动力转向泵定子曲线的差别。
It is proved in the examples that the new method works well in precisely building the pump test data in wide area into smooth curve without disturbance caused by the random test error.
通过实例计算表明，该方法可以高精度地将全区域范围的水泵试验数据拟合成光滑的特性曲线，并能够消除因试验随机误差所引起的曲线扰动。
The optimal economic working zone and economic curve were defined and compared with traditional internal combustion engine driving plunger pump.
定义了系统最佳经济性工作区域和最佳经济曲线，并与传统内燃机驱动柱塞泵系统进行比较。
Factors affecting constant pressure difference control method and advantages and disadvantages of the control plan are analyzed theoretically through pipe system head curve and pump performance curve.
根据管道水力特性曲线与水泵的性能曲线，运用理论分析的方法，对影响末端定压差控制方式的因素和该控制方案的利弊进行了分析。
Running conditions of parallel-connected variable and constant speed pump are discussed using pump performance curve, and the correct switch steps are pointed out.
利用特性曲线对变速泵与定速泵并联运行工况进行了讨论，指出其正确切换步骤。
Centrifugal pump characteristic curve on the efficiency of the highest point known as the design point, a pump at the point corresponding to pressure head and flow of work under the most economic.
离心泵特性曲线上的效率最高点称为设计点，泵在该点对应的压头和流量下工作最为经济。
According to the results of noise test, the effect of stator curve to automobile power steering pump noise were analyzed.
根据噪声测试结果，分析定子曲线对转向泵噪声影响。
The noise and vibration tests show that this transitional curve is better than normal ones, which provides the reference for studying high performance rigid rotator model vane pump.
通过噪声和振动实验验证该定子过渡曲线优于目前刚性转子式叶片泵的过渡曲线，对研制高性能刚性转子式叶片泵结构理论有参考价值。
Pump cavitation due to the particularity of curve, the curve shape of a direct impact on NPSH3 values.
由于泵汽蚀曲线的特殊性，曲线形状直接影响NPSH3的取值。
At present, the hydraulic transition process of pump usually using transformed by computer simulation of the compete characteristic curve.
目前，水泵处水力过渡过程主要利用改造过的水泵全特性曲线进行计算机模拟。
The work theory of the Roto-Jet pump is very specific and it has very simple construction and smooth performance curve and cheap maintain.
旋喷泵工作原理比较特殊，结构简单，性能曲线稳定，维护方便。
Through a study in characteristic curve of the engine and hydraulic pump, the matching efficiencies between engine and fixed and hydraulic variable displacement pump were analyzed respectively.
综合发动机和液压泵的特性曲线，分别对发动机与液压变量泵、定量泵进行了匹配效率分析；
Centrifugal pump performance curve can be used as the basis for pump selection.
离心泵的性能曲线可作为选择泵的依据。
Compared to 150 in number over the centrifugal pump with Douxiang performance curve.
比转数在150以上的离心泵具有陡降性能曲线。
Than the speed in the 80 to 150 between the centrifugal pump with a flat performance curve.
比转速在80 ~ 150之间的离心泵具有平坦的性能曲线。
In the existing 300mw steam turbine condenser performance curve, the cavitation in water ring vacuum pump is not taken account, so the curve can't exactly reflect the operation state of condenser.
现有的300MW机组凝汽器特性曲线没有考虑到水环真空泵汽蚀特性对凝汽器运行特性的影响，不能准确反映凝汽器的运行状态。
The virtual demo platform can generate automatically the characteristic curve and the analysis report of the pump besides demonstrate the whole experiment.
虚拟实验平台除完成个整实验过程，还能自动生成特性曲线、泵的分析报告和实验报告。
Determined that it is very important by comparing the total more accurate pump characteristic curve in the calculation of water hammer protection position.
通过比较确定较准确的水泵全特性曲线在水锤防护计算中有十分重要的地位。
It is proved with the example that the new method works well for water pump efficiency characteristic curve fitting.
实例计算表明，采用该方法可以较好地拟合水泵效率特性曲线。
According to the experiment and spectra analysis, the paper explains that the stator curve of the automobile power turning pump is the important factor of affecting the pump noise.
以试验和频谱分析为依据，说明汽车动力转向泵定子内曲线是影响泵噪声的重要因素。
Pass the measurement of the characteristic curve of the pump of water, and, establish the experiment to choose reasonable of pump of water.
经由过程水泵的特征曲线的测定，并、串联实验来选择合理的水泵。
YCB arc gear pumps are mainly gear, KCG axis, the pump body, cover, the axial bearing, sealing etc. Using double circular-arc gear tooth sine curve.
主要有齿轮、轴、泵体、泵盖、轴承套、轴端密封等组成。齿轮采用双圆弧正弦曲线齿形制造。
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